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- W4283162893 abstract "<p>Modern landscape dynamics in many tropical mountains is affected by changes in land cover and variations in climatic conditions. For example, large differences in elevation and aspect increase general tendencies of changes in temperature and precipitation. Moreover, human activities related to agriculture, transport, mining, and settlements can impact local hydrological conditions but also directly transform mountain relief. These external drivers can lead to the intensification of geomorphological processes, including an increase in the number of shallow landslides, which in some cases can threaten human life and infrastructure. &#160;</p><p>This study combined field-based and remote sensing data to map the distribution of landslides in a landscape representing a tropical mountain environment strongly affected by human presence. Study area includes four sites in Andes, Colombia in departments of Caldas and Risaralda: Salamina, Santuario, Santa Rosa de Cabal, Florida. Time series of high-resolution satellite imagery (Ikonos, WorldView, Pleiades) from 2000/2003, 2013/2014, 2019/2020 were used to identify the location of landslides and develop a spatial database. Remote mapping was verified during the fieldworks in 2017, 2018, and 2019. In addition, very detailed UAV data were generated for selected landslides to obtain their geomorphological characteristics. In the last step, frequency ratio modelling was used to investigate the relationship between topographical and land cover factors and landslides distribution.</p><p>In total, we mapped more than 900 small landslides characterised by an area from 10<sup>2</sup> m<sup>2</sup> to 10<sup>4</sup> m<sup>2</sup>. Most of the landslides were located in cultivated landscape (pastures, farms, plantations) or along local roads. Our results indicated four potential scenarios of landslide activities: (1) intensification of landslide processes and increase in the landslide area; (2) active landslide, but stable in terms of dimensions (2) activation of new landslides; (3) deactivation and vegetation succession. Most of the activation of new landslides and intensification of existing ones were related to direct human terrain modification, mainly developing new roads or repairing existing ones.</p><p>The research was funded by the Polish National Science Centre, Poland (Project number 2015/19/D/ST10/00251)</p>" @default.
- W4283162893 created "2022-06-21" @default.
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- W4283162893 date "2022-06-20" @default.
- W4283162893 modified "2023-09-23" @default.
- W4283162893 title "Distribution of shallow landslides in tropical mountains based on time-series of high-resolution satellite data and UAV surveys: a case study of Eje Cafetero, Andes, Colombia" @default.
- W4283162893 doi "https://doi.org/10.5194/icg2022-479" @default.
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